Cleveland Museum of Art - Ingalls Library
Isabella Stewart Gardner Museum
Personal letters, photographs, historical mss., including papers of U.S. presidents and European rulers, musical mss., letters of famous writers, photographic travel journals, visitor books, and other materials, of Gardner and the Isabella Stewart Gardner Museum
Smithsonian Institution - Archives of American Art
Letters, business records, diary, and photographs
Smithsonian Institution - Archives of American Art
Letters from Isabella Stewart Gardner to Berenson and his wife, Mary
University of Virginia
#1: Page from Isabella Gardner's travel journal of 1875. -- #2: Two pages pertaining to Japan from Isabella Gardner's journal of 1883
Dartmouth College - Rauner Special Collections Library
States that tickets to tour her house in Fenway Court may be had at the door
Morgan Library and Museum - Pierpont Morgan Library
About the duities and penalties she has had to pay for works of art belonging to her that were brought to America